Wire-drawing machine.



J. P. FENDER.

' WIRE DRAWING MACHINE. APPLIQATION FILED JULY15, 1910. 1 in 1 1 9Patented May 14, 1912.

UNITED STAZlEiPATENT OFFICE.

JOHN FREDERICK FENDER, OF ST. JOHN, NEW BRUNSWICK, GANADA,-ASSIGNOR OFONE-HALF T0 JAMES FENDER, OF ST, JOHN, CANADA.

WIRE-DRAWING MACHINE.

Specification of Letters Patent.

Patented. May 14, 1912.

Application filed July 15, 1910. Serial No. 572,155.

To all whom it may concern:

Be it known that I, JOHN FREDERICK Pmsnnmof the city of St. John,Province of New Brunswick, Canada, have invented certain new and usefulImprovements in VVire-Drawing Machines; and I do hereby declare that thefollowing is a full, clear, and exact description of the same.

My invention relates to wire drawing machines of the type in which thewire is drawn through a die and wound on a revolving drum or'wire block.

The object of the invention is to provide improved means forpreventing'the sudden strain on the wire due to the starting of theblock. 7

With the above object in view my invention may be said to consist of theconstruction, combination, and particular arrangement of partshereinafter described and particularly pointed out in the claim. Forfull comprehension, however, ofmy invention, reference must be had tothe accompanying drawings forming a part of this specification, in whichsimilar reference characters indicate the same 7 parts and wherein-Figure '1 illustrates in plan view a wire block and die carrierconstructed according-to my invention; Fig. 2 is a vertical sectionalview taken on line A A Fig. 1;

Fig. 3 is a detail sectional view of the wire gripping device; and Figs.4 and 5 are detail perspective views of parts of my improved attachmentto the wire block.

In my improved machine the wire block is located in such a position thatthe die carrier may be normally parallel to and substantially in linewith the frontof the wire bench or frame a on which the wire block ismounted. The wire block comprises a drum or cylinder 71 secured by bolts11, passing through lugs a on the drum, to a disk a and having a hub band webs 0 formed integrally therewith. The hub b is part of the blockand turns on tl're npper end of an upright shaft d which is supported inhearings in the frame wand which may be revolved by anysuitable means,not shown.

The wire to be not shown, and is passed through the die box or carrierwhich will be presently further described, the end .of the being pointedand inserted in a gripping device drawn is held on a reel,

. which will also be presently further described and which isfastened-to one end of a draw chain 6 the other end of which is attachedto a cushioning device provided with a resilient member adapted tocontract to prevent a sudden strain on the Wire when the'block isstarted. The cushioning device is preferably made in the form of anattachment which can be readily fitted to a wire block already in useand is provided with means to limit the contraction thereof,

This cushioning device comprises a longitudinally slidable bolt g,guided in a carrier h which latter is bored for the purpose and consistsof a casting in the form of a wedge having its opposite ends concave andconvex respectively and being concentric to the bldck, one side of thecarrier being recessed and the opposite side provided with a hollow bosscommunicating with and forming part of the boring in the carrier andpresenting a bearing face radial to the block to form a bearing for anexpansile helical spring j which bears therebetween and a cupped washeris adjustably retained on the bolt-by means of a nut Z threaded on thelatter, the bolt 9 having a hooked end g to which chain 6 is attached.The pur ose of the spring is to cushion the shock duc to the starting ofthe block and thereby prevent breaking of the wire, while a sleeve mencircling the bolt and encircled in turn by the spring j serves tolimit the compressionof the spring. By arranging the bolt 9, carrier hand related parts as just pointed out a resilient attachment forsecuring the wire to the wire block is provided which can easily beapplied to a block already'in use by boring therein the holes for thebolts 2' and i. accommodate the chain c, and to prevent the latter fromswinging inwardly and striking against the edge 1a of this opening whenthe block starts revolving a sheave 0 is providedagainst which the chainbears, such sheave being mounted on a plate o located in a recess p inone of the webs 0 and secured to the web by bolts or screws 0 the webbeing recessed to accommodate the plate and sheave.

The gripping device before mentioned to which chain 6 is securedcomprises a grip- The block 'b has an opening n to ping plate 1' havingan eye 8 formed therei or borings t are formed in the gripper plate andcontain and guide in their adjacent ends gripping jaws 11 havingadjacent serrated faces between which the wire, which is shown at .r, isgripped. A. hole Z through the plate 1* allows the wire to be passedtherethrough a suflicient" distance beyond the gripper jaws to insure afirm bite on the wire. To prevent the jaws turning in their sockets andthereby losing their grip on the wire when the latter is being drawnonto the block a pair'ot' pins 2 screwed into the outer walls of theborings 2?, project into grooves 3 formed in the jaws '2), any turninglIlOYOll'ltIltl of the jaws being thereby prevented while the groovesper- Init of moven'ient of the jaws necessary to compensate for wear andpermit the jaws being separated when it. is desired to insertthe wire orwithdraw it. To cause the gripping device and draw chain to keep out ofp the path of the wire as it is being wound around the block a chain 5is connected to the draw chain at a point'adjacent to the grippingdevice and. attached to a small rum 6 containing a clock spring 7 .bymeans of which tension is kept on the chain 5, such drum being rotatablymounted on a bracket 8 secured to the block.

The wire drawing die 20 is carried in a die boX or carrier consisting ofa casting i having a transverse opening 26 therethrough near lts forwardend to constitute the box receiving the die, which latter is clamped inplace by a clamping screw 27 pro ecting downwardly through the top ofthe box and I bearing on the top of the die. As it has til been foundthat the pull of the wire on the die when the block isstarted hasa'tendency to displace the die in its box and throw the matrix out ofalineinent with the wire, a horizontal adjusting screw 28 is screwedthrough a tapped boring in the front of the box 25 and bears against thedie at a. point near its outer end which is the end farthest from thewire block; the screw being located in that position in order that theposition of the die with relation to the wire may be regulated andbinding of the wire in the die prevented. By turning the screw in onedirection the die can be adjusted inwardly while by turning it in theopposite direction the die is released and the tension of the wire ispermitted to pull it outwardly. The die box or carrier 25 is pivoted ata point near its rear end as at 25 on a pair of lugs 80 formed on a baseplate 3], between which lugs the rear end of the die box is located. Therear portion of the carrier is preferably, as shown in Fig. 1, narrowerthan the front or die holding portion so asto bring the pivoted end and.lugs 30 within the eompass'of thefront portion of the box, the baseplate throughout being of substantially the same width as the front partof the carrier. Bosses 32 are provided on the sides of the carrier toserve as hubs therebetween and the lugs 30.

The base platei'll is mounted on the bench or frame a, on which the wirebloc]; is also mounted, being preferably located at the front edge ofthe bench and to one side of the wire block. The base plate is pivotedon the bench to swing borimntalb thereon. and this pivotal roniu-ctionis etl'e ted by means of a bolt 3t) passing vertically through the rearend of the base plate and the bench a" the portion of the bolt pa singthrough the base. plate. being enlarged and forming a shoulder whichrests up nthe ben h. a nut 39 threaded on the lower end of the boltserving to secure it to the bench.

To provide an hil'e tive abutment behind the pivot point of the carrier2. to with stand the force exerted upon the die by the pull. of the wirebeing wound on the drawing block the carrier extends, as shownparticularly in Fig. 2, a considerable distam-e to the rear of the pivotpoint, while to allow the front end of the carrier to swing upwardlywithout: any chance of the extended rear portion striking the base platethe pivot point is placed a suiiirient distance from the. base plate tohave the bottom of the carrier spaced therefrom. The forward end of thecarrier 25 rests, when the machine is not running, 'upon the base plateand to cause it to assume a horizontal. position a support; in the formof a transverse rib 39 preferably provided and may be located as shownon the forward top portion of the base plate. As itis undesirable tohave the weight of the front portion of the carrier and the die causethe latter to bear down upon the wire being drawn, a spring 40 isconnected at one end as at 41 to the top of the carrier near the frontend of the latter, the other end of the spring being connected to a hook42 on a bar 43 set between shoulders 44: and 45 formed on the side of anextension to east in line witlrtl1e inner one of the lugs 30. The spring40 supplements the pivots 25 and 36 in keeping the die and carrier inalinement with the draft of wire by holding the carrier up when the wireis winding up the block.

To provide a receptacle for containing soap, oil or other lubricant forthe wire a chamber is formed in the carrier to the rear of the opening20, a passage 51 for the wire leading from this chamber to the opening26 and thence to the front of the carrier.

Operation; The end of the wire to be drawn is first. secured in thegripping device. the block Z1 starts to revolve and tension is put onthe wire the spring j is compressed and yields enoughto take the suddenstrain off the wire as it is being started, the sleeve at being arrangedto stop the yielding move- The machine is then started and as n ent whenthe wire has been started to prevent the spring being compressed farenough 'to be broken and also to obviate the risk of a recoil of thespring injuring the Wire. The drawing of the Wire then proceeds in theusual manner, the tension of the clock spring 7 acting through drum 6and chain 5, keeping the gripping device and dravv chain out of the pathof the wire, and should the die 20 at any time get out of alinement withthewire this can be readily remedied block, bolted to the wire block andhaving a boss thereon and a hole therethrough and through the boss, alongitudinally slidable bolt within the hole, one end of such bolt beinghooked and adapted 'to have a chain connected thereto, a sleeve upon thebolt, of less length than the latter and abutting against the boss, aspring encircling the bolt and sleeve and bearing against the boss, awasher upon the bolt and a nut for securing such washer in place.

In testimony whereof, I have signed my name to this specificatiomin thepresence of two subscribing Witnesses.

JOHNFREDERIGK FENDER.

Witnesses:

H. RUssnLL SIMAN, G. L. BROWN.

